Anatomy

Respiratory System

adenoids

adenoids

lymphatic tissue in the nasopharynx; pharyngeal tonsils

alveolus (alveoli)

air sac in the lung

apex of the lung

tip or uppermost portion of the lung

base of the lung

lower portion of the lung

bronchioles

smallest branches of the bronchi

bronchus

branch of the trachea that is a passageway into the lung

cilia

thin hairs attached to the mucous membrane epithelium lining the respiratory tract; clears bacteria and foreign substances from the lung

diaphragm

muscle separating the chest and abdomen contracts to pull air into the lungs and relaxes to push air out

epiglottis

lid-like piece of cartilage that covers the larynx, preventing food from entering the larynx and trachea during swallowing

glottis

slit-like opening to the larynx

hilium

blood vessels, nerves, lymphatic tissue, and bronchial tubes enter and exit

larynx

voice box; containing the vocal cords

lobe

division of a lung

mediastinum

middle of the chest where the trachea divides into two branches

nares

openings throughout the nose carrying air into the nasal cavities; nostrils

pharynx

throat

pleura

double-layered membrane surrounding each lung

pleural cavity

space between the layers of the pleura

pulmonary parenchyma

essential parts of the lung, responsible for respiration; bronchioles and alveoli

trachea

windpipe

visceral pleura

inner layer of pleura lying closer to the lung tissue